Harry Anslinger - representing the United States - attempted to add provisions to criminalize all activities.
Such activities included the cultivation, production, manufacture and distribution, as well as the use of opium, coca (and its derivatives) and cannabis for non-medical and non-scientific purposes.
Other countries objected to this proposal, so the convention's focus remained on trafficking.
The Convention therefore had little effect, although it was the first treaty to make certain drug offenses international crimes; all previous treaties had dealt with regulating licit drug activity.
You can help Wikipedia by expanding it.This article related to a treaty is a stub.